Esterification reaction products

Abstract

A new esterification reaction product is obtained by an esterification reaction between an intermolecular oligo-esterification carboxylic acid of 12-hydroxy stearic acid and/or ricinoleic acid and sterol. Also, a mixture of a sterol ester of the oligo-esterification carboxylic acid and a sterol ester of the above fatty acid is obtained by reacting directly 12-hydroxy stearic acid and/or ricinoleic acid with sterol. These esterification reaction products have a good emulsifying property, hydrating property and moisture retaining property and are useful for an oil base of cosmetics and endermic liniments.

What is claimed is: 
     
       1. A composition which comprises a mixture of the esterification reaction product between an intermolecular oligo-esterification carboxylic acid of 12-hydroxy stearic acid and/or ricinoleic acid represented by the formula, ##STR3## wherein radical ##STR4## stands for the alkyl group of 12-hydroxy stearic acid or ricinoleic acid wherein R 1  is --(CH 2 ) 5  CH 3  and R 2  is --(CH 2 ) 10  or --(CH 2 ) 7  CH═CHCH 2  -- and n is 0 or an integer of 1 or more and sterol and an esterification product of 12-hydroxy stearic acid and/or ricinoleic acid with sterol, the latter being included up to 50 weight %.